package com.example.demo.controller;

import com.alibaba.fastjson.JSONObject;
import com.example.demo.mapper.CourseMapper;
import com.example.demo.entity.Course;
import com.example.demo.entity.Message;
import org.apache.commons.lang3.math.NumberUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Controller
public class GetCourseByIdController {
    @Autowired
    private CourseMapper cm;
    @RequestMapping("/getcoursebyid")
    public void getCourseById(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String courseidStr = request.getParameter("courseid");
        if (!NumberUtils.isCreatable(courseidStr)) {
            response.getWriter().write(JSONObject.toJSONString(Message.failure("format error")));
            return;
        }
       int courseid=Integer.valueOf(courseidStr);
        Course cou=cm.selectCourseById(courseid);
        response.getWriter().write(JSONObject.toJSONString(Message.success(cou)));
    }
}
